PREVOST X3-45 2011 Operator'S Manual Download

Page: 38 / 214

Controls and Instruments

NOTE

When the battery master switch (ignition
switch) is set to the off position, all electrical
supply from the batteries is cut off, with the
exception of battery equalizer check module,
ECM ignition and power supply, Allison TCM,
I-Shift transmission ECU), coolant electronic,
coolant heater and water re-circulating pump,
pro-driver, power-verter, fire alarm and
entrance door.

The ignition switch doubles as the battery
master switch. Any position other than OFF
activates the electrical circuits. Electrical circuits
are also activated when the hazard switch is
depressed. Two auxiliary master switches in
series with the ignition switch are installed on
the vehicle; one is located on the rear electrical
panel and one in the engine compartment on the
rear start panel, for maintenance ease.

The ignition switch is located on the lower left
side of the dashboard. It has four positions:

Accessories

To operate the accessories only, turn the
ignition key counterclockwise to the “ACC”
position. The key cannot be removed when in
this position.
The electrical circuits are activated when the
switch is in this position or when the hazard
flashers are activated.
The features enabled when the switch is in the
ACC position are all those linked directly to the
battery plus the exterior temperature display, the
radio or entertainment system, exterior and
interior lighting.

Off

In the

OFF

position, ignition cannot take place.

The key can be removed when in this position.

The electrical circuits are not activated when the
switch is in this position. Only the accessories
connected directly to the batteries can be
activated. These are the coolant heater and
water pump, the battery master switch, the
baggage compartments locking system, the
entrance door and Message Center Display
(MCD). Maintain the switch in this position when
parked overnight or for an extended period.

NOTE

The battery master switch is on when the
hazard flashers are activated, even if the key
is in the off position.

To place ignition switch to

, turn the key

clockwise to the first position. The key cannot be
removed when in this position.
The electrical circuits activated when the switch
is in the

ACC

position plus the transmission,

engine and accessories, ABS system, wipers,
dashboard cluster gauges and buzzers, air horn
and air dryer heater are activated when the
switch is in this position. Do not leave the key in
this position unless the engine is running.

Start

Turn the key clockwise to the second position
and release as soon as the engine starts. The
key will return to the ON position. If the engine
did not start, return the ignition key to the OFF
position before trying to restart the engine.
The ignition switch is equipped with a starter
protection which inhibits turning the key to the
START position if the key has not previously
been turned to the OFF position.

CAUTION

To avoid overheating the starter, do not
engage the starter for more than 15 seconds
at a time. Allow the starter to cool before trying
to restart the engine.

CAUTION

If the “starter on” indicator light remains
illuminated even after releasing the ignition
switch, stop the engine immediately and set
the battery master switch (ignition switch) to
the off position. Have the starter checked
immediately.

The features activated when the engine is
running are all those described above plus the
HVAC system and daytime running lights.

DANGER

Do not

use ether or other combustible

starting aid fluid on any engine equipped with
an intake air preheater. If the engine is
equipped with a preheater, introduction of
ether or similar starting aids could cause a fire
or explosion resulting in severe property
damage, serious personal injury or death.